Re: Multi-signature Verifiable Credentials

On Wed, Sep 28, 2022 at 4:08 AM Jack Tanner <jack@tonomy.foundation> wrote:
> What should the proof look like?

We're trying to lock this down over the next couple of weeks in the
VCWG. The specific sections of the Data Integrity spec (with examples)
are here:

https://pr-preview.s3.amazonaws.com/w3c/vc-data-integrity/pull/59.html#proof-sets

and here:

https://pr-preview.s3.amazonaws.com/w3c/vc-data-integrity/pull/59.html#proof-chains

> Which VC library would make the most sense for the initial implementation?

Digital Bazaar's open source vc-js library will support proof sets and
chains (as specified in the Data Integrity spec by the VCWG) in
production. There is strong customer pull for proof sets. There is not
strong customer pull for proof chains, but given that we have the
opportunity to define a global standard for doing that AND because
there are use cases like notarization that are important, we plan to
add full support for that as well.

Regarding the concept of multi-signature, I am a bit concerned that
people are talking past each other as there are a number of categories
there and it's possible that not everyone is talking about the same
categories of multisig. There are at least these categories:

* Using multiple proofs to perform set-based multi-signature.
* Using multiple proofs to perform chain-based multi-signature.
* Using multiple proofs to perform multi-level/enveloped multi-signature.
* Using a single proof to perform set-based multi-signature.
* Using a single proof to perform chain-based multi-signature.
* Using a single proof to perform M of N threshold multi-signature.
* Using a single proof to perform privacy-preserving M of N  threshold
multi-signature.

So, when you say "multi-signature" -- which one of these things are
you talking about?

-- manu

-- 
Manu Sporny - https://www.linkedin.com/in/manusporny/
Founder/CEO - Digital Bazaar, Inc.
News: Digital Bazaar Announces New Case Studies (2021)
https://www.digitalbazaar.com/

Received on Saturday, 1 October 2022 18:52:35 UTC